Lock



W. R. COX.

LOCK. APPLICATION FILED JUNE I0, 1916 Patented Mar. 23, 1920.

IN VEN TOR mgm/E 50X,

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plate or cover and lock removed.

'WARREN R, COX, OF CLEVELAND, OHIO.

LOCK.

Specification of Letters Patent.

Patented Mar. 23, ieee.

Application filed June 10,1916. Serial No. 102,811.

To all wlw/a t may concern: v

Be it known that I, WARREN R. Cox, a citizen ot' the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful limproveinentsl in Locke, of which 'the4following; is a Specification.

This invention comprises an improvement in locks, and the invention inof especial utilityv in Combination with electrical switches adapted tocontrol one or more elet-trie circuits, lor example a switch ot' thekind Shown in my Lettere Patent ot' the lnited States; bearing;` date ofJanuary ian. No. ibioo.

ln my patented lock and switch, a key is required to unlock and permitturning of the ywitch, either to the right or lei'tv andthe key couldonly be removed in the central position when the electric currentwae cutoff. My present object is to provide a lock reouiringI a key to permitthe switch to be turned on, but adapting the key to be removed in aclosed or on position ot' the switch and permitting the switch to beturned ott and locked automatically without the key.

ln the accolnpanying;` drawing, Figure l is a trent `view of my improvedlock switch. and Figi'. 2 is a sectional vienv on the vertical centerot' the lock and switch, showing' a key in place therein. Fig'. 3 is afront View of the easing' and switch 'the-rein` with the irontl rige. i,(i. T and 8 are Similar transverse sections of the lock on line .r-w"Fig'. L), :showing varioun locking and unlocking` positions ot` thepartel with and without. the key. Fig. t) is a longitudinal section otthe lock on line Si-L Fig'. tl. llig. l() is a longitudinal Section oi'the lock on line lU-10. Figi. Si. but showing); the key partiallywithdrawn to disclose the action ot the pins and piangere.

DetailingI the invention, the look coni prises a flanged hell '2 inwhich a cylindri ral plug 23 is adapted to rotate to turn a Switchmember segment l either to the right or let't into engagement with theaprinpgcou tacts G and i' confined Within the casina' F. in 'fach theaegment l, in in cenet ant engr-aire nient with eontaet 5` which islocated on the median line ot said canino' lit-mentir the anni otturning` movement ot' the plug and the eenment bridges either rapbetween. the contat-t14 (i and 'l to clone one or the other ot' tivoelectrical circuitsu in the present tfteriee `alpen 'withdrawal otl thethese circuits are indicated by the words;` Battery and Magneto on thefront plate or cover tl, see. Fig.` l, and the electrical couneetions toestablish these circuits are lmade with the binding; screws l0 for eachcontact` see Fig'. 3.

Shell 2 ie secured upon front plate tl by a screw nut 1l or othersuitable means, and the inner end of plugv 3 earriee a blade orextension having a T-ehaped extren'iity l2 adapted to project throughswitch arm i and interlock with a slotted plate 13 molded in the base ofcasing 8. Separability ot' the parte4 and removal of the cover El may beel ifected in one po, 'tion only of the switch arni JX, preferably whenthe saidv arm is turned subsequent to the introduction ot and unlockingby a key 1i havingr a hitting' and formation corresponding to the knowncylinder or pin lock keys. Plug` 3 also formed with a key opening' torereive a key of this type, and a. series o'l radial hores in the plughold plungerl 1f? ol' ditierent lengths which co-aet nith correepondngspring-pressed pins '1T in shell i to lock the plug from turning; whenthe key is withdrawn, assauming the pins and plnnaereI to be alined orregistered as .Shown in Fig'. l. In point of fact, pins 1T alone serveto lork the plug by entering' the bores in the plug` key and theretirement of the plunger-s lo. lIntrmluction of the proper key and itawithdrawal also is dependent upon an'axial alinement oi the pins andplungers` and in the present derive this proceeding; may take place intu'o posi-` tions of the plug); relatively to the nhelh but looking1 oi"the plug can take. place only in one et' the two poeitions. its showinsuch lockinpj etl'erted on a median line vertically ol.i the plug; andshelh nee lipj. i, but when the proper key ia inserted the plungreia andlockingu pins a re rained until their meet ine' ends are alined with therounded surface or' the plug; and then the plug); may he turned ineither direction, :see Filtra. :2 and l'.

Aln the ep nient device ilz the plug; be turned to pgloject ita plannersto the lett into the battery posaitioin it is iinpoefailile ton'ithdran'v the key. the plungera being; rendered ininitnable hy endengr-rimanenti, with the canine'n nee lf'ip'a. l and i). Thin anadvantage in an electrical switch ot t he kind deaerilied an linaliilityto Withdraw the key and ita pro-,ence in the lock indieaten to the. neerthat a battery eonnection ie. on, a con.

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I make it desirable to withdraw the key ,seated in bores 20 arrangedbores in the plug,

neetion by the -wa which is only temporary `in the genera use of aswitch of this type. The more permanent position is on Magneto and thisis obtained by turning the plug from battery position to magnetoposition, but convenience and safety at this time without locking theswitch so that the magneto circuit may be cut oft at will by returningthe plug and its plungers to the median position by hand through themedium of the wings or levers 18 forming integral parts of the plug' 3.`Selflocking of the parts is immediately effected when the parts arereturned to a central position, especially in the absence of the key, inthis way mak ing it possible to turn off the switch and to lock it in anoff position without the aid of the key. lVithdrawal of the key in themagneto position is made feasible by employing a second set ofspring-pressed pins 19 adapted to co-act with the plungers 16 whenturned into axial alinement therewith, said pins 19 beingalso-spring-prcssed and radially opposite the plug and' inclinedrelatively to the lnedian line on which the locking pins 17 are set.Thus, when the plug is turned with the key therein'to magneto position,the plungers 16 are placed opposite the second set of pins 19, see Fig.8, and the key is free to be withdrawn because the-pins 19 yield andpermit the plungers 16 to ride over the edge elevations 21 of the keyand to enter the bores 2O see Fig. 10. However, it is also essential toavoid .self-locking of the plug in this turned position followingwithdrawal of the key, and the desired result is obtained by making thesecond set' of pins 19' and bores 20 of larger diameter than t-he plun`gers 16 and the locking pins 17. Thus, when the key is withdrawn, thelarger lspringpressed pin's 19 will torce the; plungers 16` into theplug, but the pins 19 are effectively stopped at the round surface of'the plug, that is, at the entrance of the smaller bores in the. plug,see Fig. 5. Consequently` the plug may be turned back to the centralposition by meansof the wings or levels 18, and when this has beena-ccoi'nplished, the springpressed locking pins 17 are forced into thebeing ot the same size and design for that purpose, see Fig. 4.

ile the invention in its present form comprises locking pins to compelthe use of a key in operating a` switch, and auxiliary pins to permitrelease of the key in an on posi# tion of the switch and self-locking ofthe switch in an olf position, the invention is capable of considerablemodification and applicable alsoto various forms of switches and otherdevices. The use of a larger or different-shaped pin prevents the samefrom entering the plunger bore in the plug, but permits theplunger toenter the bore or recess in the shell when the key is withdrawn orentered.

lVhat I claim is:

1. A lock comprising a shell, 4a rotatable plug therein having a key-wayand plungers in said plug exposed to said key-way, a series of springpressed locking pins in said shell coincident with said plungers andadapted to enter the plug over said plungers, and a series of auxiliaryspring bressed pins radially disposed from within tile bore ot the shellat an inclination to the said locking pins and of a larger diameter andadapted to accommodate the withdrawal of the key.

2. A lock con'iprising a shell having a bore with two separate rows ofcavities of different diameters open thereto and radially disposed at aninclination to each other and a set ot spring` pressed pins in each rowot cavities, a plug having a key way and a set of plungers thereinadapted to engage both said rows of pins successively.

3. A lock comprising a shell and a rotata ble plug having a key-way andkeyengag nig plungers therein, and said shell having vertically disposedlocking` pins to co-act with said plungers and a separate row of Vuxiliary pins at an inclination to said locking pins and of a largersize and adapted to be retired by said plungers in effecting release ofthe, key, said auxiliary pins being adapted to bear only against thesurface of the plug.

4. A lock comprising a shell having spring-pressed locking pins adaptedto be retired therein, a key-way member rotatably mounted in said shellhaving plungers adapted to retire said locking pins when alinedtherewith and engaged by a key, and auxiliary means to permit axialmovement of said plungers by the key when the plungers and locking pinsare placed out of alinement subsequent to a rotative n'lovement of thekey-way member, said auxiliary means consisting of a series of pinsdisposed at an inclination to said locking pins within said shell and ofa size adapted to prevent the same from entering the plunger cavities inthe plug.

In testimony whereof I afiix my signature 1n presence of two witnesses,f

` WARREN R. COX.

Witnesses Guo. E. Karolien, F. C. HARRoLo.

